If a freshwater fish is placed in an aquarium containing sea water, will the fish be able to survive? Explain giving reasons.

If a marine fish is placed in a fresh water equarium, will the fish be able to surviver ? Why or why not ?

Wha does a cell show if placed in a sea water?

Excessive nutrients in a fresh-water body cause fish mortality. Give two reasons.

A concave miror is placed in water will there be any change in focal length? Give reason?

Many fresh water animals cannot survive in is marine environment? Explain .

What is fish meal ? Give its significance.

Figure shows how fish react when the glass on one side of an aquarium tank is tapped with a finger. What characteristics of living organisms does the demonstrate?